Skin substitute for heads of drums and the like.



No. 892,885. PATENTED JULY 7,1908} GiPOLAND. 'SKIN SUBSTITUTE FOR HEADS 0F DRUMS AND THE LIKE.

I APPLIOATION FILED FEB- 10, 190B- Ska UNITED STATES PATENT OFFICE.

CHRISTIAN POLAND, OF ERFURT, GERMANY.

- SKIN SUBSTITUTE FOR HEADS OF DRUMS AND THE LIICE.

Specification of Letters Patent.

Patented July 7, 1908.

Application filed February 10, 1908. Serial No. 415,244.

To all whom it may concern:

Be it known that I, CHRISTIAN POLAND, factory director, a subject of the King of Ba varia, residing at Erfurt, Kingdom of Prussia, German Empire, have invented certain new and useful Im rovements in Skin Substitutes for Heads of rums and the Like, of which the following is a specification.

This invention relates to skin substitutes for the heads of drums, tambourines, rac quets and the like, and the primary object of the same is to overcome the defects of prior similar constructions, particularly in the manner of securing the substitute to the body of the drum or other analogous device.

Skin substitutes for drums, tambourines, racquets and the like consisting of sheet metal and secured to the fixing hoop by bending them over inwardly together with the said hoop, are already known. This means of securing cannot be carried out very easily and moreover smooth perfect edges are not obtained, as, owing to the joint bending over of two pieces of sheet metal, a thick beading is produced which does not have a pleasing appearance. Moreover, this beading in bending over inwards is compressed, and, there fore, presents numerous creases. In addition to these defects the skin substitute has the tendency to spring out from the securing 1100 when the latter in tightened.

he means of securing according to this invention has the advantage over the said well known constructions in that the beading produced by the bending over of the edge of the skin substitute, is comparatively narrow and smooth, because it is extended outwardly in bending over, and not compressed as hitherto. Further, the edge of the securing hoop need no longer be bent over, as the edge of the skin substitute is first bent back and then bent or rolled over outwardly and surrounds the edge of the securing hoop which remains smooth. When the securing hoop is tightened, the skin substitute is, therefore, more and more strongly pressed upon the said hoop.

A construction of a drum with a skin substitute secured according to this invention is The edge a of the skin substitute 1) made of sheet metal, is first bent back at a right angle. Then the skin substitute 7) is inserted into the securing hoop c and bent over outwardly at d or formed into a groove or roll so that it surrounds the smooth edge of the securing hoop c and holds or jams it last, If the securing hoops c are mounted on the drum body g, and tightened by means of screws h or some other tightening device, the skin substitute is firmly pressed upon the securing hoops.

What I claim is:

1. The combination with a body, a head of sheet metal havin the edge portion bent backwardly at a rig t angle thereto and then outwardly and inwardly to form a roll, and securing means engaging the bent edge of the sheet metal head between the portion bent backwardly at a right angle and the said roll.

2. The combination of a drum body, sheet metal heads having edge portions bent backwardly in planes at right angles over the op posite extremities of the body and then outwardly and inwardly to form rolls, and securing means having straight extremities introduced between the right-angularly bent portions of the heads and the rolls of the latter.

3. The combination of a body, a sheet metal head. therefor bent at right angles against the outer side of the body end and then continued outwardly and terminally rolled inwardly, a space being formed between the inwardly rolled and right angularly bent portions, and a fastening means having a straight extremity fitted in the said space.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHRISTIAN POLAND.

Witnesses:

GUSTAV LAUTER, J12, D. H. LAUD. 

